Go Back
+ servings
featured m&m peanut butter blondies

M&M Peanut Butter Bars Recipe

Course: Dessert
Cuisine: American
Prep Time: 10 minutes
Cook Time: 16 minutes
Total Time: 26 minutes
Servings: 16 people
Calories: 336kcal
M&M Peanut Butter Blondies are a cookie bar that is full of sweet flavor. These blondies are easy to make and perfect as an after dinner treat.
Print Recipe


  • 2 ¾ cups flour
  • 1 ¼ tsp baking soda
  • ¾ tsp salt
  • 1 ¼ cups brown sugar
  • ½ cup sugar
  • ½ cup butter melted
  • cup vegetable oil
  • 1 egg
  • 2 egg yolks
  • 1 tsp vanilla
  • 1 cup peanut butter m&m’s plus more for topping
  • ½ cup peanut butter


  • Preheat the oven to 350 F. Spray a 9x13 baking pan with baking spray and set aside.
    how to make m&m peanut butter blondies
  • In a medium mixing bowl, whisk together the flour, baking soda and salt. In a large mixing bowl, whisk together the brown sugar, sugar, butter and vegetable oil. Next, add in the egg, egg yolks and vanilla and stir to combine. Add in the flour mixture and stir just until the flour is incorporated. Fold in the peanut butter m&m’s. Lastly, stir in the peanut butter.
    2 ¾ cups flour, 1 ¼ tsp baking soda, ¾ tsp salt, 1 ¼ cups brown sugar, ½ cup sugar, ½ cup butter, ⅓ cup vegetable oil, 1 egg, 2 egg yolks, 1 tsp vanilla, 1 cup peanut butter m&m’s plus more for topping, ½ cup peanut butter
    how to make m&m peanut butter blondies
  • Smooth the bars batter into the prepared baking pan. Top with extra peanut butter m&m’s. Place into the oven to bake for 16-18 minutes or until the edges are golden brown. The center will feel almost unfinished. Do not worry about that as the residual heat will finish baking it. The center of the bars will fall after several minutes on the cooling rack - this is normal.
    how to make m&m peanut butter blondies
  • Once the bars have cooled, slice into 16 squares and serve.
    how to make m&m peanut butter blondies


Storage: Bars may be stored in an airtight container or baggie at room temp for up to 6 days. These can also be frozen for up to 3 months.


Calories: 336kcal | Carbohydrates: 50g | Protein: 6g | Fat: 13g | Saturated Fat: 7g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 1g | Cholesterol: 37mg | Sodium: 259mg | Potassium: 115mg | Fiber: 1g | Sugar: 32g | Vitamin A: 89IU | Vitamin C: 1mg | Calcium: 49mg | Iron: 2mg